초록 ▼

A biaxially oriented polyethylene terephthalate resin bottle-shaped container, and method of blow-molding the same, is disclosed. The method comprises the steps of heating the body portion of a preform at 90°C. to 130°C., biaxial-orientation blow-molding the preform in a primary blowing mold heated

A biaxially oriented polyethylene terephthalate resin bottle-shaped container, and method of blow-molding the same, is disclosed. The method comprises the steps of heating the body portion of a preform at 90°C. to 130°C., biaxial-orientation blow-molding the preform in a primary blowing mold heated at 110°C. to 230°C. to form a primary intermediate molded bottle-shaped piece, heating the primary intermediate molded bottle-shaped piece at 130°C. to 255°C. or at a temperature which is at least 20°C. greater than the primary blowing mold temperature to form a secondary intermediate molded bottle-shaped piece, and blow-molding the secondary intermediate molded bottle-shaped piece in a secondary blowing mold heated at 100°C. to 150°C. to form a bottle-shaped container. The temperature of the secondary blowing mold is several degrees greater than the maximum temperature the molded bottle-shaped container will be subjected to during use. The bottle-shaped container of the present invention has no stress remaining from biaxial orientation blow-molding and has a high heat resistance temperature value.

대표청구항 ▼

A double-blown biaxially oriented polyethylene terephthalate resin molded bottle-shaped container, said double-blown container being formed from a preform initially heated, primarily biaxial orientation blow molded and shaped to form a primary intermediate shaped container, said primary intermediate

A double-blown biaxially oriented polyethylene terephthalate resin molded bottle-shaped container, said double-blown container being formed from a preform initially heated, primarily biaxial orientation blow molded and shaped to form a primary intermediate shaped container, said primary intermediate shaped container being heated and reshaped to form a secondary intermediate shaped container substantially equal to or smaller than the double-blown container, said secondary intermediate shaped container being secondarily blown and reshaped to form said double-blown container, said primary and secondary intermediate shaped containers comprising means for providing said double-blown container with essentially no residual stress, wherein the double-blown container exhibits essentially no shrinkage or deformation when said double-blown container contains contents heated to a temperature of 120°C., said double-blown container capable of containing contents heat treated at temperatures up to 120°C. with essentially no deformation or shrinkage.